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Antibiotic Selection00:57

Antibiotic Selection

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Related Experiment Video

Updated: Jul 6, 2026

Single-cell Microfluidic Analysis of Bacillus subtilis
10:37

Single-cell Microfluidic Analysis of Bacillus subtilis

Published on: January 26, 2018

Bacitracin sensing in Bacillus subtilis.

Eva Rietkötter1, Diana Hoyer, Thorsten Mascher

  • 1Department of General Microbiology, Georg-August-University, Göttingen, Germany.

Molecular Microbiology
|April 9, 2008
PubMed
Summary

Bacillus subtilis survival depends on detecting antibiotics like bacitracin. The BceRS-BceAB system directly senses bacitracin, initiating a tiered resistance response for optimal microbial defense.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Bacterial Stress Response

Background:

  • Antibiotic presence poses a significant threat to microbial survival.
  • Effective detection of antibiotics and induction of resistance mechanisms are crucial for microbial life.
  • Bacillus subtilis employs a complex network of four signal-transducing systems for bacitracin stress response.

Purpose of the Study:

  • To investigate the mechanism of bacitracin perception in Bacillus subtilis.
  • To elucidate the response hierarchy within the bacitracin stress response network.
  • To understand how Bacillus subtilis optimizes its response to antibiotic gradients.

Main Methods:

  • Analysis of the BceRS-BceAB two-component system (TCS) and ABC transporter.
  • Investigating the roles of LiaRS TCS and sigma(M) in bacitracin response.

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Related Experiment Videos

Last Updated: Jul 6, 2026

Single-cell Microfluidic Analysis of Bacillus subtilis
10:37

Single-cell Microfluidic Analysis of Bacillus subtilis

Published on: January 26, 2018

The Use of a &#946;-lactamase-based Conductimetric Biosensor Assay to Detect Biomolecular Interactions
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The Use of a β-lactamase-based Conductimetric Biosensor Assay to Detect Biomolecular Interactions

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  • Examining the YvcPQ-YvcRS system's interaction with the Bce system.

    • Main Results:

    • The BceRS-BceAB module is the primary and most sensitive determinant of bacitracin resistance.
    • BceAB functions as both a bacitracin detoxification pump and a crucial sensing component, indicating a novel direct drug sensing mechanism.
    • LiaRS TCS and sigma(M) respond indirectly to bacitracin at higher concentrations, while YvcPQ-YvcRS is cross-activated by the Bce system.

    Conclusions:

    • The Bce system directly senses bacitracin, initiating a hierarchical stress response.
    • Bacillus subtilis utilizes a sophisticated network for efficient and cost-effective antibiotic resistance.
    • The identified sensing mechanism is conserved in Firmicutes bacteria, highlighting its evolutionary significance.